ip27-nmi.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:4k
- #include <linux/kernel.h>
- #include <linux/mmzone.h>
- #include <linux/spinlock.h>
- #include <linux/smp.h>
- #include <asm/atomic.h>
- #include <asm/sn/types.h>
- #include <asm/sn/addrs.h>
- #include <asm/sn/nmi.h>
- #include <asm/sn/arch.h>
- #include <asm/sn/sn0/hub.h>
- #if 0
- #define NODE_NUM_CPUS(n) CNODE_NUM_CPUS(n)
- #else
- #define NODE_NUM_CPUS(n) CPUS_PER_NODE
- #endif
- #define CNODEID_NONE (cnodeid_t)-1
- #define enter_panic_mode() spin_lock(&nmi_lock)
- typedef unsigned long machreg_t;
- spinlock_t nmi_lock = SPIN_LOCK_UNLOCKED;
- /*
- * Lets see what else we need to do here. Set up sp, gp?
- */
- void nmi_dump(void)
- {
- void cont_nmi_dump(void);
- cont_nmi_dump();
- }
- void install_cpu_nmi_handler(int slice)
- {
- nmi_t *nmi_addr;
- nmi_addr = (nmi_t *)NMI_ADDR(get_nasid(), slice);
- if (nmi_addr->call_addr)
- return;
- nmi_addr->magic = NMI_MAGIC;
- nmi_addr->call_addr = (void *)nmi_dump;
- nmi_addr->call_addr_c =
- (void *)(~((unsigned long)(nmi_addr->call_addr)));
- nmi_addr->call_parm = 0;
- }
- /*
- * Copy the cpu registers which have been saved in the IP27prom format
- * into the eframe format for the node under consideration.
- */
- void
- nmi_cpu_eframe_save(nasid_t nasid,
- int slice)
- {
- int i, numberof_nmi_cpu_regs;
- machreg_t *prom_format;
- /* Get the total number of registers being saved by the prom */
- numberof_nmi_cpu_regs = sizeof(struct reg_struct) / sizeof(machreg_t);
- /* Get the pointer to the current cpu's register set. */
- prom_format =
- (machreg_t *)(TO_UNCAC(TO_NODE(nasid, IP27_NMI_KREGS_OFFSET)) +
- slice * IP27_NMI_KREGS_CPU_SIZE);
- printk("NMI nasid %d: slice %dn", nasid, slice);
- for (i = 0; i < numberof_nmi_cpu_regs; i++)
- printk("0x%lx ", prom_format[i]);
- printk("nn");
- }
- /*
- * Copy the cpu registers which have been saved in the IP27prom format
- * into the eframe format for the node under consideration.
- */
- void
- nmi_node_eframe_save(cnodeid_t cnode)
- {
- int cpu;
- nasid_t nasid;
- /* Make sure that we have a valid node */
- if (cnode == CNODEID_NONE)
- return;
- nasid = COMPACT_TO_NASID_NODEID(cnode);
- if (nasid == INVALID_NASID)
- return;
- /* Save the registers into eframe for each cpu */
- for(cpu = 0; cpu < NODE_NUM_CPUS(cnode); cpu++)
- nmi_cpu_eframe_save(nasid, cpu);
- }
- /*
- * Save the nmi cpu registers for all cpus in the system.
- */
- void
- nmi_eframes_save(void)
- {
- cnodeid_t cnode;
- for(cnode = 0 ; cnode < numnodes; cnode++)
- nmi_node_eframe_save(cnode);
- }
- void
- cont_nmi_dump(void)
- {
- #ifndef REAL_NMI_SIGNAL
- static atomic_t nmied_cpus = ATOMIC_INIT(0);
- atomic_inc(&nmied_cpus);
- #endif
- /*
- * Use enter_panic_mode to allow only 1 cpu to proceed
- */
- enter_panic_mode();
- #ifdef REAL_NMI_SIGNAL
- /*
- * Wait up to 15 seconds for the other cpus to respond to the NMI.
- * If a cpu has not responded after 10 sec, send it 1 additional NMI.
- * This is for 2 reasons:
- * - sometimes a MMSC fail to NMI all cpus.
- * - on 512p SN0 system, the MMSC will only send NMIs to
- * half the cpus. Unfortunately, we dont know which cpus may be
- * NMIed - it depends on how the site chooses to configure.
- *
- * Note: it has been measure that it takes the MMSC up to 2.3 secs to
- * send NMIs to all cpus on a 256p system.
- */
- for (i=0; i < 1500; i++) {
- for (node=0; node < numnodes; node++)
- if (NODEPDA(node)->dump_count == 0)
- break;
- if (node == numnodes)
- break;
- if (i == 1000) {
- for (node=0; node < numnodes; node++)
- if (NODEPDA(node)->dump_count == 0) {
- cpu = CNODE_TO_CPU_BASE(node);
- for (n=0; n < CNODE_NUM_CPUS(node); cpu++, n++) {
- CPUMASK_SETB(nmied_cpus, cpu);
- /*
- * cputonasid, cputoslice
- * needs kernel cpuid
- */
- SEND_NMI((cputonasid(cpu)), (cputoslice(cpu)));
- }
- }
-
- }
- udelay(10000);
- }
- #else
- while (atomic_read(&nmied_cpus) != smp_num_cpus);
- #endif
- /*
- * Save the nmi cpu registers for all cpu in the eframe format.
- */
- nmi_eframes_save();
- LOCAL_HUB_S(NI_PORT_RESET, NPR_PORTRESET | NPR_LOCALRESET);
- }